The 10 GB CMP 170HX (PCI ID 10de:2082) unlocks to 40 GB, some cards reach 48 GB, and 80 or 96 GB had not been made usable as of the end of October 2026. That matters to buyers, because a card can be made to report 80 GB while the memory above 40 GB is unusable.
40 GB: Proven
cmpunlocker sets the 10 GB card to 40960 MiB, five HBM stacks of 8 GB. The Memory unlock on the 10 GB card page marks this Proven, meaning reproduced by others with numbers, and it has worked since the first release, per @farawaythrower and @gmzombie (July 19, 2026).
Plan for about 37 to 38 GiB usable after reservations; exactly how much a workload can fill is Contested, the badge for points where people disagree.
48 GB: Reported, and card dependent
48 GB needs the permanent RIR fuse burn and a sixth HBM stack that is disabled rather than defective.
The status is Reported, meaning single reports rather than reproduced runs. In one tally 6 of 30 cards seen could do 48 GB, roughly 1 in 5, per @djpandaman (October 17, 2026). On most sampled cards the last stack is marked defective, per @bigfoot1144 (October 19, 2026) and @_orrorin (October 20, 2026).
80 and 96 GB: Contested
Several people got a card to report 80 GB, but the memory was unstable above 40 GB. @scallion_9883 (October 16, 2026) now believes the apparent extra capacity is aliasing in L2, not real memory, and @djpandaman (October 12, 2026) called the upper half "basically impossible" to unlock with the information available.
The other side: @_maitops (September 18, 2026) said 80 GB of HBM is inside and readable and writable from the SMs, but normal workloads crash the GSP firmware. A research repository found CUDA kernels could fill 79 GiB, yet every host-to-device write above 40 GB faulted.
Late October brought no change. @djpandaman wrote on October 29, 2026 that it "works perfectly with the small caveat of never being able to write to the upper half region", and @ob88594 said on October 30, 2026 that there was "no new progress compared to three months ago".
Warning for buyers
The wiki marks "80 GB" cards with a Warning, its badge for things that damaged hardware or lost data: a card that reports 80 GB can be resold the way fake-capacity SSDs are. Before paying, have the seller write address-dependent data above 40 GB and read it back, as Verifying an unlock describes.
One wording difference to know: the provenance page lists 48 GB as Contested, while the Memory unlock page's status section lists it as Reported.